Volumetric-displacement apparatus suitable for controlling the supply of gas for chlorinating water or similar purposes



Feb. 4', 1930. B'RAMWELL' 1,746,186

VOLUMETRIC DISPLACEMENT APPARATUS SUITABLE FOR CONTROLLING THE SUPPLY OF GAS FOR CHLORINATING WATER 0R SIMILAR PURPOSES Filed Dec. 15, 1927 a Patented Fea 1 30.

' 1o pose of measuring and controlling the sup- 7 ply of gas are known, in-which the total gas *UNITED STATES BALFOURBRAMWELL, or BELFAST, IRnLAnn VOLUMETRIC-DISPLACEMENT APPARATUS surTABtn-ron oon'raonnine 'rnnsnrrtY OF GAS FOR CHL'OBILTATING 'OR-"STMILAR,PURBOSES: :1-

Application filed December 15,1927, Serial no. 249,326, and in Great'Britain March it, 19 27. iv

This invention relates to volumetric dis- 7 placement apparatus for regulating the -sup-;.

' ply of gas for thechlorinat ing of Water or t v closed water vessel b into which the water supply isoled through a pipe Both aland' o other purposes. j This regulation is efiected'hby a water dis placement apparatus to which thegas is supplied at constant pressure, so that each oscil-Q lation of the Water'in the displacement vessel 1 represents a definite volume'of gas. Other displacement apparatus for the pure supplied in a definite time is dependent on the number of visible oscillations of the'water v I 5 'inthe displacement vessel in that time. The V difiiculty, however, is to obtain uniform and regular displacement volumes of gas at'each oscillation at different speeds of oscillations.

The object of this'invention is to provide" a construction of such apparatuswhich will give equal and positive displacements at varying speeds and prevent bubbling, so that the 5 total number of oscillationsis in direct proportion to the total volume of gas delivered I by the apparatus. v

' The apparatus constituting the present 111 ventlon comprlses a d splacementvessel and o a U-shaped venting tube so connected therea With that upon the displacement of a column 9 of liquid within the vessel toa predetermined extent by the pressure of the gas to be measured-the venting tube becomes unse'aledand permits the escape of avdefin'ite volume of the initial conditions and re-seals the vent tube.

In these respects the apparatus does not dif-r fer from known devices, but in the present invention the relation between the venting or sealing. tube andthe displacement vessel is I r such that at each pulsationof the liquid in to the interior of the vessel.

An apparatus embodying the invention is.

f shown in vertical cross section in Figll of the accompanying drawlngs, Fig. 2 being a snnilar View ofa modified construct on. a In as before the reduced pressure re-establishes leg d of the U-tube;

the"construction bf a is the displace- V mentvessel which is closed at the top and I open atthe bottom, and'islcontained in'a i e gulatediby the gasosupply, which latter is 1 i led to the displacement vessel by a? pipe e ;onf which-isfixed aregulating valve, (notshown) to control the amount of gas admittedai."

[Theuse of a U-tube c djinside the displace i ment vesselaa and its arrangement andjproi portions constitute theimportant feature and p noveltyvof t is invention. 7

, The upper end of the shorti'legf ofithis V U-tube' c (Z insidethe displacement vessel is of considerably larger diameterv than the; tube, theefiect ofwhich'is that immediately vthe water rises a littlepast -the top, a comparatively large volume overflows and forms a water seal which prevents further gas escape and prevents bubbling. The seal re-, mains untiltheifurther-supply of displaces thewater in the vessel a.

.Another featureof the invention is the" gas, again advantageous efiect of the U-tube. This is arranged so that the bottom edge of the ves' sel a extends somewhat lower than the bottom of the U-tube 0, (Z and gives suflicient time 1 for the complete emptying -of thegas from.

a'without' any bubbling. Assuming that the water is at the level I3 in the displacement vessel a, the gas'entering' thevessel through pipe e gradually depresses the Water level in vesselga and simultaneously 7 the water in the left orfunnelleg cot-the U-tube is displaced up the right legld by the pressure of the entering gas, and when the" water level in the left legof. the U-tube reaches level L the U-tube seal is, forced and the gas escapes freely through the leg (I. "The consequent sudden release of pressurewithin i the displacement vessel permits the Water in' vessel (1 to rise again to level L and reestab- V lish the'seah ,It will" be seen that at each pulsation a definite volume of water and-a definite volume ofgas escape through the It is not necessary to use an outer containing vessel 1) provided the water flows sufficiently quickly through the inlet pipe f on each pulsation within the displacement vessel. Accordingly in the modified construction shown in Fig. 2 the outer vessel 12 is omitted and the water supply pipe f is taken direct to the displacement vessel a and has a cross section comparable with that of the Vessel a itself. v

Having thus described the nature of the said invention and the best means I know of carrying the same into practical effect, I claim d 1. An apparatus of the character herein referred to, comprising a displacement vessel closed at its upper end, a U-shaped vent tube having one limb provided with an enlarged end and extending into the displacement vessel to a point adjacent the upper end of the latter with its bend adjacent the lower end of a said vessel andit s other limb extending outside the said vessel, means for admitting a hqtnd to the lower portion of sald vessel, and means for adm tting gas under pressure to the upper portion of said vessel.

2. An a paratus of the character herein referred to, comprising a displacement vessel open at its lower end and closed at its up 'er end, a U-shaped vent tube disposed wi hin the said vessel with the end of one limb adjacent the upper end of the vessel and its other limb extending outside of said vessel, the bend of the 'U-tube being above the lower edge of the displacement vessel, and means for admitting gas under. pressure to the upper portion of said vessel.

In testimony whereof I have signed my name to this specification,

entrees BBAMWELL, 

